<template>
 <div class="goodsinfo-container">

     <transition
            @before-enter="beforeEnter"
            @enter="enter"
            @after-enter="afterEnter">
        <div class="ball" v-show="ballFlag" ref="ball"></div>
     </transition>

        <div class="mui-card">
				<div class="mui-card-content">
					<div class="mui-card-content-inner reducepadding">
					<swiper :lunbotuList="this.lunbotu"></swiper>
					</div>
				</div>
		</div>

        <div class="mui-card">
				<div class="mui-card-header">{{goodsinfo.title}}</div>
				<div class="mui-card-content">
					<div class="mui-card-content-inner">
                         <p class="price">
                             市场价：<del>￥{{goodsinfo.market_price}}</del>&nbsp;&nbsp;销售价：<span class="now_price">￥{{goodsinfo.sell_price}}</span>
                         </p>
                         <p>购买数量：
                             <numbox @getcount="getSelectedCount" :max="goodsinfo.stock_quantity"></numbox>
                         </p>
                         <p>
                             <mt-button type="primary" size="small">立即购买</mt-button>
                             <mt-button type="danger" size="small" @click="addToShopcar">加入购物车</mt-button>
                         </p>
					</div>
				</div>
        </div>

        <div class="mui-card ">
				<div class="mui-card-header">商品参数</div>
				<div class="mui-card-content">
					<div class="mui-card-content-inner fontweight">
						<p>商品货号：{{goodsinfo.goods_no}}</p>
                        <p>库存情况：{{goodsinfo.stock_quantity}}件</p>
                        <p>上架时间：{{goodsinfo.add_time}}</p>
					</div>
				</div>
				<div class="mui-card-footer">
                    <mt-button type="primary" size="large" plain @click="goDesc(id)">图文介绍</mt-button>
                    <mt-button type="danger" size="large" plain @click="goComment(id)">商品评论</mt-button>
                </div>
			</div>

 </div>

</template>

<script>
import swiper from '../subcomponents/swiper.vue'
import numbox from '../subcomponents/goodsinfo_numbox.vue'
export default{
    data(){
        return{
            id:this.$route.params.id,
            lunbotu:[], //轮播图数据
            goodsinfo:[], //商品信息数据
            ballFlag:false,  //小球开关
            selectedCount:1   //商品默认数量
        }
    },
    created(){
        this.getLunbotu();
        this.getGoodsInfo();
    },
    methods:{
        getLunbotu(){
            this.$http.get("getthumimages/" + this.id).then(result => {
                if(result.body.status === 0){
                    result.body.message.forEach(item => {
                        item.url = item.src;
                    });
                    this.lunbotu = result.body.message;
                }
            })
        },
        getGoodsInfo(){
            this.$http.get("getgoodsinfo/" + this.id).then(result =>{
                if(result.body.status ===0){
                    this.goodsinfo = result.body.message[0];
                }
            })
        },
        goDesc(id){     //点击使用编程式导航跳转
            this.$router.push({name:"goodsdesc",params:{id:this.id}})

        },
        goComment(id){
             this.$router.push({name:"goodscomment",params:{id:this.id}})
        },
        addToShopcar(){
            this.ballFlag = !this.ballFlag;
            var goodsinfo = {id:this.id,count:this.selectedCount,price:this.goodsinfo.sell_price,selected:true};
            this.$store.commit("addToCar",goodsinfo);
        },
        beforeEnter(el){
            el.style.transform="translate(0,0)"
        },
        enter(el,done){
            el.offsetWidth;
            const ballPosition = this.$refs.ball.getBoundingClientRect(); //实现小球动画适配不同滚动条位置和分辨率
            const badgePosition = document.getElementById("badge").getBoundingClientRect();     
            const xDist = badgePosition.left - ballPosition.left;            //计算出小球起点与小球终点离页面x轴y轴的距离
            const yDist = badgePosition.top - ballPosition.top;
            el.style.transform=`translate(${xDist}px,${yDist}px)`;
            el.style.transition="all 1s cubic-bezier(.4,-0.3,1,.68)";
            done();
        },
        afterEnter(el){
            this.ballFlag = !this.ballFlag;
           
        },
        getSelectedCount(count){    //当子组件把选中的数量传递给父组件的时候，把选中的值保存到data上。
            this.selectedCount = count;
            //console.log(this.selectedCount)
        }
    },
    components:{
        swiper,
        numbox
    },
}
</script>

<style lang="scss"  scoped>
.goodsinfo-container{
    .fontweight{
        font-weight:400;
    }
    background-color:#ccc;
    overflow:hidden;
    .reducepadding{
        padding:2px;
    }
    .now_price{
        font-size:17px;
        font-weight:bold;
        color:red;
    }
    .mui-card-footer{
        display:block;
        button{
            margin:15px 0;
        }
    }
    .ball{
        width:15px;
        height:15px;
        border-radius:50%;
        background-color:red;
        position:absolute;
        z-index:99;
        top:363px;
        left:150px;
     
    }
}

</style>